Very similar to a Chilled Logic puck 
I run those as well 
What are the specs of those??
Yup! Competition to Chilled Logic. Pucks are perfect for light rails 
Sweet! IP64 rated once complete That is a discriminator with regards to aquaponics or outdoor greenhouse.
They make QB coatings now. But i want full on polycarbonate board lenses.
I made these for vegging.
I also have some tiny full spec strips custom built for aquarium plants. But i have them for intense light output for tissue culture testing.
EB strip lights are really good for close canopy. I like to build those as well! Nice lights Soft coral and Live Rock tanks use to be something I played with many moons ago. Love aquariums 
Nice. I can run 14 or 17 strips on a single driver but never made really big ones.
Those are 3.5 foot Bridgelux EB’s at 3500k, 80CRI. 100W.
Two of these in a 2x4 tent outperform a California Light Works SolarXtreme 250 hands down… and about $80 less
Yep. I would use those also. My lights cost me a $1 a watt.
So what would be your recommendation for 2 Emerson Effect lights for a 3x5 tent? I did some reading up on it after your post and at least now have a basic understanding of the reason to use far red supplemental lighting.
Do you run yours after your main lights turn off, or during the main light on? I just read several different methods for using them.
Now I am just going to mention this, and I am sure it is a simple matter of more overall light, but my buds closest to my two 5000k side lights have more trichomes than anything in the middle of the tent under the SF-4000. At this point and because I have not yet cured these…(they are getting chopped today) I have no idea if this has made any difference in potency either bad or good.
Good choice along with a power supply? If I build one I would get 4 I have structural aluminum I can build a bracket out of. I have never done LED builds at all, so I would assume that if I get a splitter and a power supply I can run all four and use the on off cycle side of my digital controller to come on at main light off and then off 15 min later. I have a duel sided digital controller one side for lights, and the other side for controlling things such as ebb and flow.
Yeah, those are great! I think Rapid also has Cree in far red. I would use 4 pucks for the space you have. I will reply back with a Bill of Materials and see what you think.
Gotta smoke a bowl first 
Almost forgot, I use WIFI power strips so I can set light schedules for each outlet
I would do two pucks per light (two lights). Use a two way splitter so one power supply drives both pucks.
But of course lol…
I already have a digital light timer, one side has two outlets for main lights. The other side is for intermittent on/off for systems like ebb and flow, so should work just fine for a short on/off for the pucks.
So on your list you are saying get 4 pucks with lenses, power supply adapters, four mounting brackets, two splitters, four thermal pads? Will one 30v power supply drive all 4 pucks? Also do you just use a standard 14/3 power cord off the splitters? They don’t explain much on their site.
One 12V can be split for two pucks so -
(2) supplies
(2) splitters
(4) pucks and pads
You could run all four with the 30V in series, I would think 
Pucks, pads, and ancillary options if you want/need (brackets and lenses)